These Orbiters are scientific working
models representing the Sun, Earth
and Moon and their relationships. They
demonstrate basic earth and moon motions,
the causes of day and night, seasons
and phases of the moon. The orbiters are
scaled to show relative sizes, distances
and motions of the earth. The earth
and moon, however, are shown in true
scale (1 inch = 2000 miles). The illustrated
lesson plan booklet covers: Earth’s rotation, earth’s revolution and
tilt, length of day and night, phases of the moon, why we see only one side
of the moon, sun and moon eclipses, explanation of tides and much more.